Tool holder



B. T. BROWAND Sept. 29', 1931.

TOOL HOLDER Filed March 14. 1928 2 Sheets-Sheet 1 8 wuemtoz Sept. 29, 1931. B. T. BROWAND TOOL HOLDER Filed March 14. 1928 2 Sheets-Sheet 2 m a 5 m m 3 w u e W H 5 wi 4 2 -H M ,0 1. e -m -Ww 9 2 4 m w Patented Sept. 29, 1931 UNITE- l STATES PATEN F-ion BEN JAMIN'T BROWAND, or cLEvELAnnfonIo Tool. HOLDER dpplicationrfiled March. 14,1928. Serial no.as1,452.

The present invention relatesto tool holders, particularly toolholders for metal working machines, such asl'athes, .drill' presses, and boring and finishing machines. Ingeneral my object is to provide a tool holder whereby various sizedcutting tools may be gripped and held, wherebyajpair of grin ping members for the tool may be independently adjusted; and} set at difierent distances from the axis ofthe holder, and whereby the said adjustable gripping members and the tool may be jointlyj'adju'st'ed-and set indifferentpositionsfrelatively tothe axis of. the holder, all with a viewof facilitating 'place-, ment of the tool in respect to the. work and of givinga wide range of'adjustment for vary.- ing conditions and kinds of work. Other and more specific objects arealso embodied in the details of the construction of the holder, all as willhereinafter more fully appear.

In the accompanying drawings- Fig; 1 is a side view of the .tool'holder (ma reduced scale; Fig. 2 a bottom View thereorgand Fig. 2A a top view of the slidabIe head aloneand Fig.3 is an end view of the holderdand Fig. 4 a side view with the head and cutting: tool adjusted and set in a different position than as shown inFig. 1 Fig. 5 is'a bottom View of the holder adjustedascin Figi 4. 'Fig. 6 is a. bottom view of thebase partof the holder as it appears when the 'slidable headisremoved. Fig. 7 is a per speetiveview of one of the tool gripping elements, and Fig.8 is a similar view ofthe same; element inverted.

Fig. 9 is an enlarged sectional view transversely of the holder, and Fig. 10 a sectional view longitudinally of the holder, without a tool and the upper end of the shank being broken away. Fig. 11 is a sectional view corresponding to Fig. 10 with the slide or head moved to the left. Fig. 12 is a sectionalview transversely of a tool gripping member and the slide or head, on a reduced scale.

parts, to wit, a base part 2 fixed .immovably in any suitable way to a tapering shank 3, and a slide or movable head 4 connected to said base part. The base part and head have corresponding flat sides and rounded ends,

apart from the main body, of'thehol'der.

The holder comprises a body made in two I v H I g opening16-extending lengthwise thereof and and their meeting faces are channeled and ribbed to' interlock with each other, having either a rabbeted 0r dovetailed joint so that the head may move or slide at'right' angles to the ax is fof the shankand lengthwise upon the baseipart. Base part 2 has a 'screwthreaded bore, 5 extending'lengthwise thereof at its center, and thisbore also extends through the connecting portion of shank 3.

Co-extensive with this bore is. a smooth counter-bore 5 of larger diameter, and because'bore 5 is formed parallel with andrelatively near the flat bottom 0t base part 2 a longitudinal'slotfi is. provided inthe bottom at one end ofbase part ..2 opposite counterbore 5.. An adjusting screw 7 extends'into screw-threaded boref5,'.a'nd this adjusting screw is provided with anannular enlargement, head or flange 8 adapted to fit. the counter-bore 5 and to project through slot 6 into a flat-sided circular recess. or groove9 in the top face. of movable head 4 near one end th'ereof,'see Fig. .10. The enlarged end jofscrew .8 i'sflpr'ovide'd with a wrench receiving opening 10', and when thescrew is rotated head 4: may be shifted a substantial distance lengthwise of baseipart 2. The flat end face of screw 7 is also provided with radial graduations or marks 11 which maybe brought consecutively into registerzwith an-index mark-1246mm outer end of bodypart 2 and head'4 to indicate the .degreeof rotation of the screw and the movement. imparted to head 4; andthe cutting tool; T. A locking screw. 12 also extends .into'one side of body part 2,-which screw has a flat head 13 adapted to overlap the jointlinebetween base2 and head 4 and to clampagainsta flatshoulder 14;

2 after adjustments have been made. Usually'such' locking only required when. the holders are used; for lldngyperiods of time without-readjustment;

'ina notch recess 15 in one side of the liead, thereby locking the'head rigidly. tqbase part for a pair of movable clamping jaws or gripping members 1818,'respectively, for the tool T. Each tool gripping member is provided with flanges 19 adapted to rest slidably within the rabbeted guideways 17, and the clamping portions 20 of the gripping members 18 are angular or of V+shape andof dove-tail interlocking pattern to more securely grip various sizes and shapes of stems and shanks of the cutting tools when the gripping members are forced together by a set of feed screws 2020, one for each member 18. Thus, the screws 20 extend throughscrewthreaded openings in the opposite ends of head 4, and the inner ends of the screws have annular enlargements 21 adapted to be con- Tfined within and interlock with the flanged lgrooved portions'22 in the flat endwall of the gripping. members 18. These members or clamping jaws 18 may be detached and removed by lifting them upwardly through the open top of head 4 when the head itself is detached from baseflpart 2 but not otherwise.

From the foregoing it will be seen that the clamping jaws or gripping members 1818 may be shifted lengthwise in the slot or open ing 16 in head 4 by backing up one screw and feeding the other screw in the same direction.

' 1 said head Accordingly both of the jaws or gripping members 1818 and tool Talso may be shiftved transversely in respect to the axis of shank 3 of the holder, and head 4 may also be shifted transversely but in greater degree relatively to the same axis, thereby afiordinga doubleadjustment for the cutting tool in respect to the work. The construction of the holder is also such that the tool is rigidly held and supported in a stable position regardless of the range of adjustment or its setting in respect to the shanlgalthough the sectional body of the holder encloses the operating parts very compactly, considering the extensive range of adjustments afforded thereby.

What I claim,is: v

1.. A tool holder, comprising a supporting member; a cross head secured slidably tot-he bottom of said member, an adjusting screw for said head extending through said mem:

ber, said head having a rectangular opening therein, the top of said head being rabbeted at opposite sides of said opening; a pair of flanged clamping elements seated with their 3. A tool holder, including a supporting part, a head slidably secured to said part, a screw to shift said head, a screw to lock said head upon said part, a pair of tool clamping jaws supported between said supporting part and said head, and screws to shift and lock saidjaws.

4. A tool holder, including a supporting part, a slidable head, an adjusting screw for said head, a locking screw for said head, a pair of adjustable. tool clamping elements mounted between said head and said supporting part and extending through said head, adjusting screws for said elements, all said screws having wrench sockets of the same size in the ends thereof.

, 1 5. A tool holder, comprising a supporting member, a cross head secured slidably to the bottom of said member, a slot recessed at optheir fiangedportion within said recessed portion of said slot and extending into said slot and a'pair. of adjusting screws extending through the side wall of said head into the slotted portion thereof, said clamping elements having groovedportions in their flat end walls engaging annular enlargements of said screw members for rotatable connection therewith. v

6. A tool holder, comprising a base section having rabbeted sides and a slotted bottom, an adj sting screw extending through said base section having a flanged head projecting through the bottom slot, a head section having ribbed and channeled sides slidably inter-engaged with the rabbeted sides of said base section and provided with a cross groove nterlocked with the flanged head of said adusting screw, a recessed elongated slot extending vertically through said head section,

a pair of flanged clamping j aws slidably conned within the vertical slot of said head section and seated with its flanged portion in the recessed portion of said slot, and adjusting screws extending through opposite sides of said head having annular portions detachably and rotatably coupled with said clamping jaws. 1

In testimony whereof I afiix my'signature.

BENJAMIN T. BROWAND.

flanges within said rabbeted top and extending into said opening;

tending into said opening ,with said clamping elements. 7

2. A tool holder, includingasupporting member, a slidable head, means for'sliding for engagement for said head, and means adj ustably mounted upon said head for holding a tool, said tool holding means being held in place by said supporting member. c j

upon said member, a locking device and a pair of adjusting screws within opposite. ends of said head ex- 

